<<CLAYTON COUNTY PROPERTY TAXES. The CC Board of Assessors mailed out approximately 89,115 2018 real estate property notices last month to residential propery owners. Each notice includes the Fair Market Value for Ad Valorem Taxation for 2018, last year's value, a return value, if any, and an estimated tax bill using the last year's millage rate. Anyone with questions concerning their valuation should contact the Tax Assessor's Office between 8 a.m. and 5 p.m., Monday throught Friday aat the Historical Courthouse, 2d floor or call 770-477-3285. Appeal deadline is June 4th.